Sr. Software Developer – Application Migration & Modernization.

Accountabilities

• Maintain, enhance, and modernize existing applications built with C#, .NET Framework 4.8, ASP.NET MVC, ASP.NET Web Forms, and Web API.

• Support the migration of legacy applications toward more maintainable, scalable, and modern architectures while ensuring business continuity.

• Develop, integrate, and maintain application services and APIs, including systems that use Windows Communication Foundation (WCF).

• Work with Microsoft Internet Information Services (IIS) to support application hosting, configuration, deployment, and troubleshooting.

• Design, maintain, and optimize database solutions using Oracle PL/SQL, PostgreSQL, PL/pgSQL, and SQL.

• Analyze existing codebases and database structures to identify opportunities for performance improvements, simplification, and modernization.

• Use Git and CI/CD practices to manage source code, streamline deployments, and maintain reliable development workflows.

• Contribute to cloud-based application environments using AWS services, including EC2 and RDS.

• Apply AI-assisted development tools and agentic workflows where appropriate to accelerate implementation, code analysis, testing, and modernization activities.

• Collaborate with technical stakeholders to troubleshoot issues, validate solutions, and deliver reliable application improvements.

Requirements

• Strong professional experience in software development, particularly maintaining, enhancing, and modernizing enterprise applications.

• Proficiency in C# and the .NET Framework 4.8, with practical experience in ASP.NET MVC, Web API, and Web Forms.

• Familiarity with WCF and IIS in application development, integration, hosting, and maintenance contexts.

• Strong database development skills, including Oracle PL/SQL, PostgreSQL, PL/pgSQL, and SQL query optimization.

• Experience using Git for version control and working with CI/CD pipelines to support automated build and deployment processes.

• Knowledge of AWS infrastructure, particularly EC2 and RDS, and an understanding of application deployment in cloud environments.

• Ability to analyze legacy systems, understand existing business logic, and implement improvements without compromising critical functionality.

• Familiarity with AI-assisted software development tools and agentic workflows, or the ability to adopt these tools effectively.

• Strong analytical and troubleshooting skills, attention to detail, and a commitment to producing maintainable, reliable code.

• Effective communication and collaboration skills, along with the ability to work independently in a remote environment.

• Sufficient English proficiency to communicate about technical requirements, collaborate with stakeholders, and document development work.

Benefits

• Remote work: Opportunity to work remotely from Brazil.

• Senior-level technical ownership: Contribute to application migration, modernization, and continuous improvement initiatives.

• Enterprise technology experience: Work with established Microsoft technologies, relational databases, and cloud infrastructure.

• Modern development practices: Apply CI/CD workflows and AI-assisted engineering tools to improve productivity and software quality.

• Technical development: Deepen your expertise in legacy application modernization, backend engineering, database systems, and AWS.

• Contractor opportunity: The application process requests salary expectations in US dollars, indicating a contractor-oriented compensation discussion.